Armored, aquatic goo that can be randomly encountered on the high seas of the Nintendo Entertainment System (NES) video game Dragon Warrior III. Very rarely, an adventurer may find a Wing of Wyvern (a magical, feathery artifact that allows the user to instantly teleport him or herself, and any allies in their immediate vicinity, to a destination they have previously visited) tucked away inside a defeated Marine Slime's shell. Many humans consider slimes to be good luck, consequently, they actively hunt Marine Slimes for their shells, which they then use to fashion jewelry, horns, and other items. Children have also been known to capture and keep young Marine Slimes as pets in makeshift fishbowls/aquariums. Marines Slimes are less dangerous than their terrestrial cousins, the Slime Snails.

ABILITIES:These seafaring slimes attack their opponents by ramming them with their shells; this spiked, conical crust can deliver multiple, and painful, puncture wounds. These shells are also very hard and substantially reduce the amount of damage a Marine Slime suffers from physical blows. Marine Slimes may cast the spell 'Increase'; this incantation raises the defensive strength of the caster, and any allies, potentially making an entire group of monsters temporarily more resistant to injury.

WEAKNESSES:
The soft, jelly-like body of the Marine Slime is very easily ruptured, fortunately for them, their shell makes this very difficult to do. While they can breathe equally well above or below the waves, the gelatinous tissue of these monsters needs to remain moist; they can only survive out of water for a very short period of time before they dry out and die. Marine Slimes will flee in terror from enemies they perceive to be significantly more powerful than themselves.